JSSC 2021第3期mm-Wave65nm

A 96-mWCh 10-MHz Wide-Bandwidth Electrical Impedance Tomography IC With Accurate

一款用于早期乳腺癌检测的10MHz宽频带电阻抗断层成像IC，具有高精度和小尺寸特点。

65nm CMOS, 10MHz带宽, 4.32°相位误差, 1.6mΩ/√Hz阻抗分辨率

电阻抗断层成像乳腺癌检测宽频带相位补偿高分辨率

▸宽频带仪表放大器(WB-IA)：采用高频宽频带设计，能够在10 MHz频率下检测癌细胞的大阻抗变化，显著提高了EIT图像的分辨率，实现了1.6 mΩ/√Hz的阻抗分辨率。

▸双模式驱动器(DM-driver)：通过消除复杂的开关网络，减少了系统噪声并缩小了系统尺寸，同时提高了驱动效率，使系统能够在低功耗（9.6 mW每通道）下稳定运行。

▸相位补偿环路(PCL)：有效校正相位误差至4.32°，确保图像准确性，避免了伪影问题，提升了系统的整体性能和可靠性。

▸高集成度设计：采用65-nm CMOS技术，芯片面积仅为16 mm²，实现了高集成度和低功耗，适合便携式医疗设备应用。

Abstract

An eight-channel 10-MHz wide-bandwidth electri- cal impedance tomography (EIT) IC is proposed for early breast cancer detection system. To increase the resolution of EIT images, the proposed IC has three key features: 1) wide-bandwidth instrumentation ampliﬁer (WB-IA) to detect large impedance changes in cancer cells at a high frequency; 2) dual-mode driver (DM-driver) to obviate the complex switching network to reduce the noise and the system form factor; and 3) phase compensation loop (PCL) to